html{
	width: 100%;height: 100%;
	body{
		width: 100%;height: 100%;
		.viewport{
			width: 100%;height: 100%;position: relative;
			.header{
				width: 100%;position: fixed;top: 0;left:0;height: 47px;
			}
			.content{
				width: 100%;height: 100%;overflow: auto;box-sizing: border-box;position: absolute;left: 0;top:0;
				.container{
					margin-top:48px;overflow: auto;
				}
			}
		}
	}
}

